Weather Advisory
Subject: Storm “MATMO”
No.4 (280/2025)
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At 10.00 a.m. LST (4 October
2025), severe tropical storm “MATMO” over the upper South China Sea or at
latitude 18.2 degrees north and
longitude 115.6 degrees east with maximum sustained winds
about 100 km/hr. This storm is moving west with a speed of
25 km/hr., expected to intensify and move pass Hainan,
China into the Gulf of Tonkin and make landfall over upper Vietnam during 5–6
October 2025. Storm “MATMO” is forecast to downgrade rapidly due to the
extending of the high-pressure system from China during 6–7 October 2025. This storm is not move to Thailand.
The
storm “MATMO” effects to the southwest monsoon prevailing over the Andaman Sea,
Thailand and the Gulf will strengthen. More rains are likely in the North and
the Northeast while isolated heavy rains are possible in the North, the
Northeast, the East and the South during 5-7
October 2025. People in the areas should beware of heavy rains and
accumulation that may cause flash floods and overflows especially along the
waterways near foothills and lowlands.
The moderate wind
and waves in the upper Andaman Sea are expected 1-2 meters high and above 2 meters high in thundershowers. All ships
should proceed with caution and keep off thundershowers.
This
advisory is in effect on 4 October 2025, at 11.00 a.m.
This
next issue will be on 4 October 2025, at 05.00 p.m.
(Signed) Sugunyanee Yavinchan
(Miss Sugunyanee
Yavinchan)
Director-General
Thai Meteorological Department